Yearly Maintenance Of Fuel Cell Module; Filling And Venting The Heating System After Maintenance Work - Viessmann Vitovalor PT2 Installation And Service Instructions For Contractors

Commissioning, inspection, maintenance

5-yearly maintenance of fuel cell module

Resetting the service indicator on the programming unit of the fuel cell module
Note
If "bAD" appears on the display, the service indicator
cannot be reset. This may be because the mainte-
nance interval has not yet been reached, for example.
In such a case, inform Viessmann Technical Service.
1. Turn on the ON/OFF switch on the fuel cell mod-
ule.
Filling with distilled water and restarting the system
See page 74.
Terminating maintenance mode and activating energy manager
See page 76.
10-yearly maintenance of fuel cell module
10-yearly maintenance involves replacing the "flamma-
ble gases sensor" in addition to the 5-yearly mainte-
nance.

Filling and venting the heating system after maintenance work

1. Refill the heating system (see previous chapters).
Activating the filling function
Tap the following buttons:
1.
2. "Service"
3. Enter password "viservice".
4. Use to confirm.
Activating the venting function
Tap the following buttons:
1.
2. "Service"
3. Enter password "viservice".
4. Use to confirm.
84
(cont.)
2. Use to select "33".
3. Simultaneously press SET and .
"34" will appear on the display.
4. Press and hold SET for at least 3 s.
"_CL" will appear on the display.
The service indicator has been reset.
Replacing the sensor
Installation instructions provided
2. Check the system pressure.
5. "Service functions"
6. "Filling"
7. Activate the filling function with
The display shows the system pressure.
The filling function ends automatically after 20 min
or when you tap .
5. "Service functions"
6. "Air vent valve"
7. Activate the venting function with
The display shows the system pressure.
The venting function ends automatically after
20 min or when you tap
.
.
.